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US 9,239,069 B2Granted
Adhesive-coated dowel
AssigneeGeorgia-Pacific Chemicals LLC
InventorsRobert A. Breyer, Bobby L. Williamson, Steven O. Clausen, Daniel Tingley
Life of this patent
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Abstract
A dowel coated with a heat-activated, B-staged formaldehyde-based resin and a related method of using the resin-coated dowel for joining separate components together.
Claims20
An adhesive coated dowel, comprising:
- a dowel substrate having an outer surface, a first end, and a second end, wherein the dowel substrate has a length of about 0.5 inches to about 3 inches and circumferentially-spaced, longitudinally extending flutes disposed therein between the first end and the second end;
- and
- a B-staged formaldehyde-based resin coated on the outer surface of the dowel substrate, wherein the B-staged formaldehyde-based resin is a thermosetting resin, and wherein the B-staged formaldehyde-based resin was produced from a formaldehyde-based resin heated to a temperature of greater than 110° C. and to about 177° C.
An adhesive coated dowel, comprising:
- a dowel substrate having an outer surface and a first end opposite a second end, wherein the dowel substrate has a length of about 0.5 inches to about 3 inches, and wherein the dowel substrate has circumferentially-spaced, longitudinally extending flutes;
- and
- a B-staged formaldehyde-based resin coated on the outer surface of the dowel substrate, wherein the B-staged formaldehyde-based resin comprises a phenol-formaldehyde resin, a furfural-formaldehyde resin, a melamine-formaldehyde resin, a phenol-melamine-formaldehyde resin, or any mixture thereof.
An adhesive coated dowel, comprising:
- a dowel substrate having an outer surface and a first end opposite a second end, wherein the dowel substrate has a length of about 0.5 inches to about 3 inches, wherein the dowel substrate is fabricated from wood, and wherein the dowel substrate has circumferentially-spaced, longitudinally extending flutes disposed therein and between the first end and the second end;
- and
- a B-staged phenol-formaldehyde-based resin coated on the outer surface of the dowel substrate, wherein:
- the B-staged formaldehyde-based resin is dried and at least partially cured,
- the B-staged phenol-formaldehyde resin was prepared with a formaldehyde to phenol (F:P) molar ratio of about 1.8 to about 2.4,
- the B-staged formaldehyde-based resin was produced from a formaldehyde-based resin heated at a temperature of greater than 110° C. and to about 177° C.,
- the B-staged phenol-formaldehyde resin was prepared with about 0.1 mol to about 0.7 mol of an alkaline catalyst per mol of phenol,
- the B-staged formaldehyde-based resin is a thermosetting resin, and
- the alkaline catalyst comprised an alkali metal hydroxide, an alkaline earth metal hydroxide, a tertiary amine, or any mixture thereof.
6 more elements
Dependencies are inferred from the claim text.